Improvement in saw-swages



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@met i NELSON JOHNSON, JASPER, NEW YORK.

' Letters Patent No. 88,177, dated Mci/rch 23, 1869. y

IMPROVEMENT IN SAW-SWAG-ES.

.Thochedule referred to in these Letters Patent and making part of the same.

To all whoml it 'may concern:

Be it known that I, NELSON JOHNSON, of Jasper, in the. county of Steuben, and State of New York,

have invented a new and useful Improvement in Saw-- Swages; and I do hereby declare'that the following is a. full, clear, and exact description thereof, reference being had to the accompanying drawing, which is made a part of this specification.

The subject of my invention is a changeable swage for saw-teeth, adapted to be attached to the saw while being used, and operating by means of a changeable die, or anvil, held againstthe under side of the teeth, and suitable spreading-dies, all of novel construction and arrangement, to which the tooth is made to conform, by means of punches, or swage-pins, of suitable forms, or-a peau-hammer, applied direct.

In the drawing'- Figure v1 is a plan view of my improved swage;

Figure 2 is a side elevation, partly in section, illustrating the manner of applying the device to a saw; and

Figures 3 and 4 are vertical sections, in the planes indicated by the lines :rf-x and y-y, iig. 2, respectively.

Similar letters of reference indicate corresponding Y parts in the several figures.

A represents a stock, or die-holder, preferably made in two parts, as shown, connected by means of screws, a al a2.

B represents a roller, or cylinder, of hardened steel, journalled in a suitable recess formed in the two parts ofthe stock A, as shown in fig. 3, and having, formed on'its periphery, a number of faces, b bl b2, either of which, by the turning of said roller, may be brought into position to act upon the saw-tooth uudenwhich it is placed, as shown in lig. 2, it being provided with an angular end, b*, for the introduction of a wrench, by .which to turn it.

O C represent a pair of arms, or bars, attached, by screws a3, to the respective sides of the stock A, and having journalled in their outer ends aroller, D, which Ais pierced transversely, to receive a punchfor swagepin, E, fitted to slide therein.

The lower ends of the bars C are slotted, as shown at c, for the reception of their attaching-screws a3, and are thus adapted to support the swage-pin in diierent positions, to suit different sizes and forms of teeth.

F F are plates, of hardened steel, secured in the inner faces of the two parts of the stock A, immediately' behind the roller B, and provided, ou their upper edges, with suitable longitudinal depressions, j, to form a cutting-lange on each side of the tooth, as represented in figs. 2 and 3.

The form of the punch-holder adapts the punch to be readily applied to the tooth, over either of the dies, as desired, and also to be turned entirely away, or removed, when it is desired to use a hammer, instead of the punches.

G is a slide, or gauge, attached to `the rear end of the stock A,v by means of a screw, (d, and adapted to be adjusted vertically by means of a slot, g;

This gauge rests on the edge of the saw, behind the tooth, and regulates the position ofthe swage, so that the dies F shall operate in the manner described.

H is an eccentric-lever, fulerumed on an unthreaded portion of the screw a2, and forming the front support ofthe swage. It ie employed to force the roller B up against the tooth, and is made adjustable, by the provision of a number of perforations, ai, for the reception of its fulcrum, a2, to adapt the swage for different sizes of saws.

-fr" is a set-screw, inserted through one side of the stock A, above the clamping-screw a, to prevent the upper edge of the stock being bent inward by the pressure of said screw in clamping the swage ou the saw, which may be done entirely by it.

lwo or more of the faces of the die-roller B may be made dat, and of various widths, to correspond with the length of flat point which it is desired to form on the tooth. -Another may be convex circumferentially of the roller, to draw out a longer and thinner point. One or more may have longitudinal convexities, of different degrees, by which the point of the tooth may be expanded, laterally, vto any necessary extent; and another may be provided with an angular projection, to form a dovetail or other shape on the end of the tooth.

The dies F, and, consequently, the rest 'G, may be dispensed with in some cases, they being only required in swaging the form of tooth represented.

The punch and holder may also be dispensed with,

when desired, and a suitable peau-hammer used instead, as before stated. y

We also propose, when it islnot desired to adapt the swage for d-iiierent sizes of saws, or, perhaps, in either case, casting or otherwise forming the stock in one piece, making suitable provision for the reception of the va.- rious parts; and, when the stock is so constructed, or in the form of stock described, journalling the swagepin holder in the sides of the stock, when desired; in which latter case, the swage may readily be adapted to be used with a peau-hammer, by slightly modifying the form of the stock, so that it may be applied to the saw in either position, and, when in the reverse position, have its die sufiiciently exposed to allow of the hammer being applied direct.

Having thus described my invention,

I claim asnew therein, and desire to secure by Letters Patent- 1. The adjustable punch, or swage-pin holder, consisting of the perforated arms C and roller D d, employed in combination with the stock A and punch E, substantially as described, for the purpose set forth.

2. In combination with the stock A, constructed in two parts, as represented and described, the set-screw a and clamping-screw al, arranged and employed in the with the die B, substantially as a'nd for the purpose manner described, for the purpose specified. set forth.

3. The dies F, arranged, relatively to the point-die To the above specification of my said invention, I B, in the manner set forth, and employed to form sidehave signed my hand, this 9th day of July, 1868. l cutting flanges on the tooth, substantially as described. NELSON JOHNSON.

4. The adjustable gauge, or rest G, in combination Witnesses: with the stock A and adjustable bars O O, substanl S. COUNTRYMAN, tally as and for the purpose specified. A. B. SIMPSON.

5. The eccentric-lever H, employed in combination i 

